Stove structure



- Dec. 6, 1927. 1,651,542

- E. w. PlTTMAN STOVE} STRUCTURE Filed May 2'7, 19% 4 Sheets-Sheet l INVENTOR [vMesr/ffirmm/ ATTORNEY Dec. 6, 1 92 7.

E. w. PITTMAN STOVE STRUCTURE 4 Sheets-Sheet Filed May 27 tllll'ill'ii 'VI VVVI I n lllllllll vm AT TORNEY I Dec. 6, 1927.-

E. w. PITTMAN STOVE STRUCTURE Filed May 27, 1925 4 Sheets- Sheet 3 INVENTOR ER/VEsTMfirr'Mfi/K' ATTORNEY BY W Dec, 6, 1927. 1,651,542

E. W. PITTMAN STOVE STRUCTURE Filed May 27, 1925 4 Sheets-Sheet 4 ATTORN EY Patented Dec. 6, 1927.

UNITED STA' l ES PATENT OFFICE.

ERNEST W. PITTMAN, F WHEATON. ILLINOIS. ASSIGNOR, BY MESNE ASSIGNMENTS, TD STANDARD GAS EQUIPMENT CORPORATION OF MARYLAND.

STOVE STRUCTURE.

Application filed May 27, 1925.

This invention relates to the frame structure of stoves and ranges, such as gas stoves, electric stoves. and the like, and the inven tion consists of certain improvements in the form and construction of the door frame; the manner of attaching the same to the stove structure; the form and construction of the stove doors: the form and construction of the hinges for mounting the doors in the door frame; and other features of construction, said improvements having in view the production of a stove structure of light, efficient, and durable form, pleasing and finished in appearance, and in which the parts will be held firmly together without danger of looseness or displacement.

In the specification to follow the invention will be described in detail, and thenovel features thereof pointed out in the appended claims.

In the accompanyingdrawings:

Fig. 1 is a perspective 'view of the forward portion of a stove having the invention embodied therein.

Fig. 2 is a fragmentary view in front elevation of one side ofthe door frame structure and door, a portion of the door being broken away to show the hinge therefor.

Fig. 3 is a vertical sectional elevation on the line 33.of Fig. 2.

elis a view similar to Fig. 3, on an enlarged scale, showing the door in open position.

Fig. 5 is a horizontal section on an en larged scale on the line 55 of Fig. 2.

Fig. 6 is a side elevation of a portion-of the blank employed in forming the oven door.

Fig. 7 is an elevation of the inner side of the door formed from the blank of Fig. 6.

Fig. .8 is a vertical section through the upper portion of the door frame and door on the line 8-8 of Fig. 1.

Fig. 9 is a perspective view of the blank from which the door frame is made.

Fig. 10 is a similar view showing the blank in the first stage of its formation to produce edgefia'nges thereon.

Fig. 11 is a perspective view of the same, notched in its opposite edges to enable it to be bent into U form.

Fig. 12 is a perspective view of the notched blank of Fig. 11 showing the same bent longitudinally to give it ahollow tube-like form in cross section.

Serial No. 33,274.

Fig. 13 is an inside perspective view of a portion of the longitudinally bent blank of Fig. 12.

Fig. 14 is an outside perspective View of the finished door frame, showing the notched blank of Fig. 12 bent at the points where the notches are located, to give the frame its U form.

Fig. 15 is aninside perspective view of I the same.

Fig. 16 is an elevation of the blank from which the front wall of the oven door is constructed. i

Fig. 16 is a cross section through the same.

Fig. 17 is an elevation of said blank notched and shaped preparatory to bending it into form.

Fig. 17 is a cross section through the same.

Fig. 18 is an elevation of the notched blank after being partially bent into form.

Fig. 18 is a cross section through the same. I Fig. 19 is an elevation of the blank fully bent to form.

Fig. 20 is an elevation ofthe completed (not shown), is supported on a suitable base- 2, the said walls enclosing a heating cham her which is divided by a horizontal partition or oven floor a, into an oven chamber at the top and a broiler chamber beneath,

which chambers .,are adapted to be closed at their front by doors 9, only one of which, that for the oven chamber, is shown as mounted in a door frame3 fixed to the front of the oven walls. i

The door frame 3 is of inverted U form in general-contour, and comprises the vertical side bars 5 and 6, and the horizontal top cross bar 4 connectedto the upper ends of the side bars, the said bars extending along and connected to the front edges of the side walls of the oven structure, and the cross bar extending along and being connected to the front edge of the top wall of the same. The frame thus constitutes a marginal edging for the front of the oven walls,

\1 wall 6 extending inwar ing of a form andconstruction which will serve as a support and mounting for the oven doors.

The door frame 3is made preferably from a sin le piece of sheet metal which is sha ed and bent, as will be presently describe in detail, to give it a hollow or shell-like form in cross section and is formed with a front wall 6 extending linearly throughout the extent of the frame, an outer side wall 6 extending rearwardly from the outer edge of the frontwall at right an les thereto, a rear gly from the rear edge of the side wall and disposed some distance in rear of the front wall, by means of which rear wall the frame is fastened to the oven structure, an inner side wall 6 extendrearwardl from the inner edge of the front wall, and an angular flange 3 connected to the edge of the inner side wall and constituting a ledge or jamb for the oven door to close against. The door frame thus constructed and constituted, forms, due to the bending of the metal at the 'unction of the several walls or flanges, a sti and light unitary structure, and lends itself to the best advantage in giving support to the oven doors, and for attachmentby bolts or other suitable fastening means, to the walls of the oven structure without the said fastening means being visible. 7

This will be best understood by reference to Fig. where itwill be seen that the rear ill .wall 6 of the frame structure consists of an inclined portion 3 extending inwardly from the inner edge of the side wall, and an angularly related terminal portion 3 which are seated flatly and abut against the front face of a flange extending inwardly from the front edges of the oven walls and consisting of an inclined ortion 1 and an an larly related termin ortion 1, which a utting parts are firmly olted together by. fastenmg bolts 8 extending through the terminal portions 1 and 3 at suitable intervals, and the terminal portion 1 bein formed with a forwardly turned lip 1 against which the inner edge of the terminal portion 3 abuts,

and by which, relative motion or slip of the parts will be effectually prevented. The angularly related ortions of the rear wall of the door frame t us interlock with the angularly related portions of the flange on the oven walls, whereby the proper location of the door frame on the oven structure in the assembly of the parts is facilitated and assured, and the relative motion or looseness of the parts of the assembled structure prevented. i 1

While by this method of attaching the door frame to the oven walls, a very stable, firm, and close connection of the parts is secured, the attaching means are wholly enclosed within the walls and therefore entire 1y concealed from view, so that the structure A sheet metal blank is provided of the form shown in Fig. 9, and by suitable tools or dies the edges of the blank are bent along longitudinal lines so as to form thereon the angular flanges 3' 3 and 3 as shown in Fig. 10, the flanges 3 3 to eventually form the rear wall of the finished frame, and the flange 3 to form the inner side wall or jamb ledge of the finished frame. As shown Fig. 11, the flangedblank is next notchedm opposite edges as at 3 and 3" through the flanges at two points in the length of the blank, to permit the latter to be subsequently bent to give the frame its final inverted U form. Next the notched flanged blank is bent on a lon itudinal line midway between its flanged e ges, so as to dispose the bent portions at right angles to. each other as shown in Fig. 12, whereby the structure is given the hollow or shell-like form in cross section which the finished frame possesses as before described. The hollow notched structure of Fig. 12 is now given the final inverted U form of the nished frame by bending the end portions inwardly towards each other, at the apices of the notches, and disposing the bent portions parallel to each other to constitute the side bars 5 and 6, (see Figs. 14 and 15), before alluded to. In this action the diagonal edges of the several notches are caused to instance by welding. This bar in the present instance is made from a single piece of sheet metal which is bent on longitudinal lines so as to present a front vertical flatface or wall 7", an upper horizontal ledge 7", a vertical flange 7" extending upwardly from the rear edge of the ledge, and a lower vertical flange 7 at the lower edge of the bar. the said bar being fastened in place preferably by welding the ends of thefront Wall 7* to the inner s1 e walls of the U-frame as shown at 7". This center bar serves the three-fold purpose of affording a support for the forward end of the horizontal partition or oven floor a before alluded to, which is suitably fastened at its front edge to the upper edge of the flange 7"; a su port constituted by the ledge 7'- and flange for the door 9 of the oven chamber; and an abutment constituted by the flange 7 for the upper edge of the door of the broiler chamber as will more fully appear later on. The doors 9, of which there will be two, one for the oven chamber, and one f r the broiler chamber one only being shown. are in the present instance made of sheet metal and are of box like or hollow form consisting each, as shown in Fig. 21, of a main body portion or front wall 9" having side and end walls 9 provided with inturned lips 9", and a back plate 9 welded or otherwise fastened to the'inturned lips and constituting the rear wall of the door. In making up this door structure a sheet metal blank of the form shown in Fig. 16 is provided, having thrown up at its center a panel 9 for strengthening it. The corners at the top of the blank are cut away and notched as shown at 9 and 9,- and the lower corners are cut away and recessed as at 9 and 9 The marginal portions of the blank are now bent rearwardly to form the end and side walls 9", and the edges of the walls are bent inwardly to form the lips 9; As a result of these bending actions. the edges of the notches are brought together and they are united by welding to preserve the final form of the structure; the form of the cut away portions and notches 9 and 9 being such that the lower ends of the side walls will terminate a short distance above the lower wall 9 of the door and slots 9 will be formedin the intilrned flanges 9 adjacent their lower ends as clearly shown in Figs. 4 an 21.

u The hinged support of the door 9 by the center bar 7 is effected through the medium of two rocker plates or hinges 10, consisting each of a stem '10 and an elliptical rocker head 10 on the lower end of the stem, the said stems being seated flatly against the inner sides of the side walls of the door at their lower ends, to which they are welded,

' 7 and in contact with the flange 7", the

head-s being held on the ledge and against the flange by means of curved arms 10", extending rearwardly from the stems 10 of the rocker plates and sliding through vertical slots 3 formed in the angular flanges 3' of?" the door frame. The ends of said arms terminate in hooks 10. adapted, when the door is swung down to a horizontal open position, to engage with wear plates 10 fixed to the sides of the door frame, and thereby limit the downward movement of the door and hold the same in a. horizontal open position.

axis of'the elliptical heads extends at right" angles to the plane of the door. so that the curved edges of the heads on such major axis are. engaged with the ledge in the final stage of the opening movement of the door. and by such engagement; the door is lifted bodily slightly and brought in its full open position to a level with the floor a of the oven chamber. thereby enabling cooking utensils in the oven to be drawn outwardly therefrom without obstruction and be received directly and supported by the ovendoor.

On reference to Fig. 4 it will be seen that as the door is swung upward from its horizontal open position to a closed position. due to the engagement of thecurved edges on the minor axis of the rocker heads with the ledge, the inner curved edges of the arms 1O will come into engagement with the lower walls of the slots 3. and in'the continued closing movement of the doorQthese edges will maintaimengagement with said walls I and thereby hold the rocker arms on the supporting ledge. i

In the closed position of the door as shown in Fig. the lower end wall 9 thereof will be sustained close down to the upper surface of the ledge 7 of the center bar, the rear face of the door at its lower end will lie flatly and closely against the flange 7f of the center bar. while the remaining marginal surface at the rear face of the door will bear flatly and closely against the angular flange 3 projecting inwardly from the inner side wall of the door frame: whereby the oven chamber will be effectually sealed by the door against the entrance of cold air and the escape of hot air.

It will be observed from Fig. 1 that by reason of the form and construction of the hinge members and the manner of attaching and mounting them, they are practically hidden from view. both when the door is in closed'position. and in open position. the only visible portion of thehi'nges being the very limited areas of the elliptical heads where ghey project beyond the.front wall of the oor.

In order to counterbalance the weight of the door in its opening and closing movements and assist in the closing movement, counterbalancing tensionsprings b are employed as shown in Figs.v 3 and 4, which springs are attached at their lowerends t0 brackets c on the door frame and at their upper ends to the hooks 10 of the rocker plates. 1

I ll

While in the foregoing description and accompanying drawings the invention is disclosed as embodied in a certain detailed form and construction of the parts, it will be understood that these details may be variously changed and modified without departing from the invention; and it will be further understood that the invention. is not limited to any particular form or construction of the parts except in so far, as such limitations are specified in the claims.

I claim: I

1. A- door frame for a stove structure,said frame being formed from a single piece of sheet metal andcomprising two side bars and an end connecting bar, said bars being hollow in cross section and comprising a front wall, inner and outer side walls extending rearwardly from the edges respectively of the front wall. and a rear wall extending inwardlyfrom the outer side wall.

2. A door frame for a stove structure. said frame being formed from a single piece of sheet metal and comprising two side bars and an end connecting bar, said bars being hollow in cross section and comprising a front wall, inner and outer sidewalls extending rearwardly from the edges respectively of the front wall, and a rear wall extending inwardly from the outer side wall, the said walls being formed with opposing notches at two points in their length, and bent at the apices of the notches to give the frame a U shape, and the edges of the notches being united to preserve said shape.

3. A door frame for a stove structure, said frame being formed from a single piece of sheet metal bent along transverse lines to form twoside bars, and an end connecting bar, and said bars being bent along longitudinal lines to form a front wall, inner and outer side walls extending rearwardly from the edges respectively of the front wall, and a rear wall extending inwardly from the outer side wall. i

4. A stove structure comprising side walls enclosing a heating chamber and formed at their front with inwardly extending marginal flanges, and a door frame formed with side walls and with rear walls extending inwardly from the rear edges of said side walls and seated against and fastened to the said marginal flanges.

5. A stove structure comprising side walls enclosing a heating chamber and formed at their front with an inwardly extending marginal flan e, and a sheet metal door frame formedwith two side bars and an end connecting bar, said bars being hollow in cross section and comprising a front wall, inner and outer side walls, and a rear wall extending inwardly from the rear edge of the outer side wall, said rear wall bein seated against and fastened to said margina flange.

6. A stove frame structure comprising side walls enclosing a heatin chamber and formed at their front with inwardly extendwardly fromthe rear edges of the side walls and consisting of angularly related portions seated against and secured to the angularly related portions of the marginal flanges.

7. A stove frame structure comprising side walls enclosing a heating chamber and formed at their front with an inwardly extending marginal flange having a forwardly extending terminal lip. and a door frame applied to the front of said walls and provided with an inwardly extending flange seated against and fastened to said mar 'nal flange and having its edge abutting sai lip. 8. In a stove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface at the bottom of the heating chamber, a door adapted to seat against the door frame to close said chamher, and means for hingedly supporting the door to permitit to be opened to a horizontal position, said means acting to lift the door bodily in its movement to a horizontal open position to dispose its inner side on a level with the bottom of the heating chamber.

9. In a stove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface at the bottom of the heating chamber, a door adapted to seat against the frame to close the heating cham-, ber, heads fixed to the lower end of the door and adapted to be supported by and rock on said supporting si'irface, and means independent of the said supporting surface for holdingthe same on said supporting surface in all of'the-positions of the door.

10. In astove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a horizontal bar fixed at its, ends to the sides of the door frame, .a horizontal partition supporting the door: on saidbar-to permit,

it to be opened to a horizontal position said .3

means acting to lift the doonibodily in its movement to a horizontal position, .to:=dispose the inner side of the same on a level, with the bottom of the heating chamber 11. In a stove structure, the combination,

of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface supported at the bottom of the heating chamber, a door frame applied to the front of said walls, a.

door supporting surface at the bottom of the heating chamber, a door adapted to seat against said frame to close 'the heating chamber, heads fixed to the bottom of the door and adapted to be supported bv and rock on said supporting surface to hingedly support the door, and arms fixed to the door and extendin rearwardly therefrom and cooperating with the door frame in holding the rocker heads on the supporting surface.

13. In a stovestructure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface at the bottom of the heating chamber, a. door adapted to seat against said frame to close the heating chamber, heads fixed to the bottom of the door and adapted to be supported by and rock on said supporting surface to hingedly support the door, and arms fixed to the door and extending rearwardly therefrom through slots in the door frame and cooperating with said door frame in holding the rocker arms onthe supporting surface.

14. In a stove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface at the bottom of the heating chamber, a door adapted to seat against said frame to close the heating chamber, heads fixed to the bottom of the door and adapted to be supported by and rock on said supporting surface to hingedly support the door, and arms fixed to the door and extending rearwardly therefrom, said arms being provided with means for limiting the opening movement of the door.

15. In a stove structure. the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface at the bottom of the heating chamber, a door adapted to seat against said frame to close the heating chamber, heads fixed to the bottom of the door and adapted to be supported by and rock on said supporting surface to hingedly support the door, arms fixed to the door and extending rearwardly therefrom and cooperating with the door frame in holding the rocker heads on the supporting surface, and springs acting on said arms to counterbalance the weight of the door and assist in the closing movement.

16. In a stove structure, the combination of walls enclosinga heating chamber. a door frame applied to the front of said walls and formed in its sides with slots, a door supporting surface at the bottom of the heating chamber, a door adapted to seat against said frame to close the heating chamber, heads fixed to the lower end of the door and adapt- 'ed to be supported by and rock on said supporting surface to hingedly .support the I door. and arms fixed to said door and exthe lower walls of the slots to hold the heads on the supporting surface.

17. In a stove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls and formed in its sides with slots, a door supporting surface at the bottom of the heatin chamber, a door adapted to seat against said frame to close the heating chamber, elliptical heads fixed to the lower end of the door and adapted to be supported by and rock on said supporting surface to hingedly support the door, the major axis of said heads extending at right angles to the plane of the door, and arms fixed to said door and extending rearwardly through the slots in the door frame the lower edges of said arms being curved and adapted by engagement with the lower walls of the slots to hold the heads on the supporting surface.

18. In a stove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a door supporting surface at the bottom of the heating chamber, a door adapted to seat against said frame to close the heating chamber, heads fixed to the lower end of the door and adapted to be supported by and rock on said supporting surface to hingedly support the door, arms fixed to the door and extending rearwardly therefrom and cooperating with the door frame in holding the rocker heads on the supporting surface, and hooks on the ends of the arms adapted by engagement with the door frame to limit the opening movement of the door.

19. In a stove structure, the combination of walls enclosing a heating chamber, a door frame applied to the front of said walls, a horizontal bar fixed at its ends to the sides of the door frame and formed with a horizontal supporting ledge and a vertical abutting surface at the rear edge of the ledge, a door adapted to seat against said frame to close the oven chamber, rounded heads fixed to the lower end of the door and supported by-and rockable on said ledge and engagin said abutting surface," and means indepen ent of the heads to hold them on the ledge and in engagement with the abutting surface.

20. A stove door comprising a front rectangular body portion or wall, a marginal flange extending rearwardly from the edges of said body portion at right angles to the plane thereof, and constituting the side and the end walls of the door, a marginal lip ex tending inwardly from the edge of the flange and disposed some distance in rear of the body portion to leave a space between the two, and a plate ,fastened to said lip and constituting the rear wall of the door; whereby a hollow door structure is formed with flat extended side and end walls.

21. A stove door comprising a front rectangular'body portion or wall, a marginal flange extending rearwardly from the edges of said body portion at right angles .to the plane thereof and constituting the side and the end walls of the door, a marginal 1i extending inwardly from the ed of the ange and disposed some distance 1n rear of the body portion to leave a space between the two, a plate fastened to said lip and constituting the rear wall of the door, the lower ends of the side walls terminating some distance above the lower end wall, and plates seated againstand fastened to the inner sides of the side Walls and provided at their lower ends with rocker heads projecting below the lower end wall, for hingedly supporting the door.

In witness whereof, I have hereunto set my hand and aflixed my seal this 21st day of May, 1925.

ERNEST W. PITTMAN. [L. 8.] 

